Chevrolet 1973 Overhaul Manual page 49

4 -1 8 REAR AXLE DIFFERENTIA L CARRIER
Fig. 4B —D iffe re n tia l Bearing In sta lla tion
flange surface which mates with ring gear. Clean all
surfaces.
3. Liberally coat the differential case pilot with hypoid
lubricant. Pre-align ring gear and differential case
bolt holes, and press on adaptor plug J-8107-4 to
initially start ring gear on case pilot, as shown in
figure 5B.
4. Start all ring gear bolts during initial assembly to
maintain bolt hole alignment. Draw up all bolts
evenly, using a criss-cross pattern to avoid cocking
the gear on the case.
5. Insure that the gear is seated firmly against the
case, then torque the bolts to 90 ft. lbs. for
passenger cars, and 60 ft. lbs. for truck models.
Reassembly
1. Install thrust washers and side gears into case. If
original parts are being reused, replace in original
positions.
2. Position pinions and thrust washers through loading
hole in case 180° apart so they engage side gears.
3. Rotate gears until the differential pinion bores and
the case shaft holes are aligned.
4. Install pinion shaft and lock screw. It is not
necessary to torque lock screw until axle shafts are
installed.
5. Differential may be installed in carrier now, or
after service is performed on the drive pinion.
Installation and Adjustment
1. Check condition of bearing, bearing cups, cup seat
in carrier and carrier caps to make sure that they
are free from nicks, burrs and foreign material.
2. Lubricate bearings with axle lubricant; position
cups on proper bearing, then install differential
assembly in carrier and support the assembly to
prevent it from falling.
3. Install strap J-22779-6 on left bearing by tightening
bearing bolts alternately and evenly to snug fit.
4. With the ring gear tight against the pinion gear
(.000" to .001" backlash) insert gauging Tool
J-22779 between the left bearing cup and carrier
housing as shown in Figure 6B.
5. While oscillating tool, turn adjusting nut clockwise
until a noticeable drag is produced.
6. Tighten lock bolt on side of tool.
7. Between the right bearing and carrier, install
Service Spacer A (.170"), Service Shim B and
Feeler Gauge C. Thickness of Feeler Gauge must
be sufficient to produce a slight "drag" when moved
between carrier and Service Shim.
8. Now measure the above dimensions as shown in
Fig. 7B.
a. Using a micrometer as in Figure 8B measure the
thickness of J-22779 in a minimum of three
Fig. 6B —In sta llin g Gauging Tool
OVERHAUL MANUAL